Rootconf 2015

DevOps and scaling infrastructure


Security Containers: how Snap CI leverages containers to safely run thousands of builds a day.

Submitted by Sahil Muthoo on Thursday, 9 April 2015

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Section: Full talk Technical level: Advanced


  • A deeper understanding of how container based virtualization works.

  • Appreciation for the trade-offs between isolation, levels of privilege and scale.

  • A real world example of building a cloud based Continuous Delivery platform, will serve as a case in point.


Mind map outlining the session:

Building a cloud based CI tool, comes with a unique set of challenges.

You’re running other people’s code on your infrastructure, thousands of times a day.

The system needs to be designed so that:

  • Users are free to do what they want inside their sandbox including running commands as root.
  • Users should not be able to do anything outside their sandboxes.
  • The system can run thousands of such builds per day per machine.

We will explore the trade-offs between these requirements - since each pulls in a slightly different direction.

Next we will incrementally break-down Snap CI’s solution in detail and explore potential
alternative approaches. Finally we’ll look at how things may change in the future.

Speaker bio

I love programming, unix and craft beer - in no particular order. I’m also one of the primary developers of
Snap CI. A hosted continous delivery platform that offers build pipelines in the cloud.

I’m currently busy building Dev To Prod. A screencast based platform with a focus on DevOps,
continuous delivery and mechanical sympathy.



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